Size-independent Shear Band Formation in Amorphous Nanowires made from Simulated Casting
arXiv:1002.2799 · doi:10.1063/1.3340908
Abstract
Molecular dynamics simulations indicate that surfaces strongly influence the strain localization behavior of amorphous nanowires in tension. A sample preparation routine that simulates casting was employed to facilitate the relaxation of the sample surface. Samples as short as 15 nm (7.5 nm in diameter) form dominant shear bands during deformation. The elastic energy release during plastic deformation is sufficient to provide the excess potential energy required for the shear band nucleation at rather small sample sizes. The results show that shear band formation is almost size-independent and is bounded only by its own length scale.
arXiv comment13 pages, 3 figures, to be appeared in Appl. Phys. Lett
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- Size-independent Shear Band Formation in Amorphous Nanowires made from Simulated Casting
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- Dominant shear bands observed in amorphous ZrCuAl nanowires under simulated compression
- Bridging necking and shear-banding mediated tensile failure in glasses
- Distinguishing failure modes at the molecular level by examining heterogeneity in local structures and dynamics